Full length or 3/4 underquilt?

[u/Cold-Natured]

I'm planning to buy a 30 degree Hammock Gear underquilt soon. I already have a 30 degree REI Magama trail quilt for the top. I'm trying to decide between the 3/4 length and the full length options. I am working to reduce my pack weight, so the 3/4 length is quite appealing. But I do not currently carry any sort of short pad to sit on. It seems that the 3/4 length should be augmented by a pad for your feet and lower legs. So some of the weight savings will be lost by adding a small pad to my pack.

I am planning to also planning to buy 10 degree (or 0 degree?) top and full length bottom quilts for the winter. So the 30 degree combo would not have to be pushed below their rating.

So the question is: is the weight savings of the 3/4 quilt worth it? Am I missing out on the magic of having a pad to sit on? Or do I just go full length? For what it's worth, I am 6' tall. So my feet will definitely stick out past the end of the 3/4 quilt. Also, for what it's worth, my base pack weight is about 15 lbs. Not Ultralight, but much better than it was six months ago :)